{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["cell line", "RNA", "cell type", "DNA", "protein"], "input": "Promiscuous transcriptional activity of the reticuloendotheliosis virus ( REV ) long terminal repeat ( LTR ) was detected in transient expression assays using LTR- chloramphenicol acetyltransferase -encoding gene chimeras , and cells of diverse species and tissue type; levels of expression from two different REV LTRs correlate with reports of pathogenicity of the respective viruses in vivo."}
{"cell line": [], "RNA": [], "cell type": [], "DNA": ["reticuloendotheliosis virus ( REV ) long terminal repeat", "LTR", "LTR- chloramphenicol acetyltransferase -encoding gene chimeras", "REV LTRs"], "protein": ["chloramphenicol acetyltransferase"]}